Which of the following is a small hormone that can stimulate or inhibit many normal cell functions?
a) Enzyme
b) Kinins
c) Cytokine
d) MHC
e) Leukocyte
c
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Extracellular calcium plays a role in contraction inA) skeletal muscle cells.B) smooth muscle cells.C) cardiac muscle cells.D) None of these types of cells.
What will be an ideal response?
Which of the following are functions of articular cartilage?
A. minimize friction and wear at a joint B. protect against joint dislocation C. both A and B D. neither A nor B
The relative refractory period occurs after the action potential is complete because of the
a. lingering inactivation of the voltage-gated Na+ channels. b. slowness of the voltage-gated channels. c. the sodium-potassium pump. d. both (a) and (b). e. both (b) and (c).
Steroids, peptides, and nucleic acids are the three classes of hormones.
Answer the following statement true (T) or false (F)